Wheel Speed

Fig 1: Identifying Oscilloscope Wave Form

Courtesy of MAZDA MOTORS CORP.

ABS HU/CM terminal:
RF: P (+)-O (-)

RR: N (+)-L (-)

LF: R (+)-Q (-)

LR: T (+)-S (-)
Oscilloscope setting: 0.2 V/DIV (Y), 4 ms/DIV (X), AC range.
Vehicle condition: When turned 1 revolution per second.
NOTE:
- As vehicle speed increase, period of wave shorten.
- If malfunctioning in the sensor rotor, wave profile warp.